I have a new model A3 2.0 TDI SE Sportback first registered end March 2013. Since delivery I have had problems with the automatic parking brake sometimes not releasing when reversing. It works perfectly every time when going forwards. I realise that the doors must be closed and you must have your seat belt on before it will work.
When reversing and the brake does not release I either press the brake button to release it or depress the clutch and try again. When trying again releasing the clutch the brake usually releases on the second or third attempt. I lived with this situation until a few scary occasions when the car was facing down a hill and I had to do a reverse hill start. Pressing the brake button in these cases causes the brake to release immediately and depending on the position of the clutch the car either lurches backwards or rolls forward. In view of this I took the car back to the dealer. After three days of investigation the dealer said they had reported their findings to Audi and that there was a problem with the 2.0 TDI parking brake software of which Audi were aware. They said they would call me back when new software is available. This was nearly 3 months ago since when I have heard nothing. Has anyone else experienced this problem with the new model A3???